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Optimization of Magnesium Phosphide Treatment Used to Control Major Dried Fig Storage Pests
Kamer Betul Meyvaci,Fatih Sen,Uygun Aksoy 한국원예학회 2010 Horticulture, Environment, and Biotechnology Vol.51 No.1
Methyl bromide (MeBr), a fumigant widely used to control storage pests in dried fruit and nut industry, is banned for use because of ozone layer depletion according to the Montreal Protocol. Dried fig industry is the most affected from MeBr ban due to prevalence of storage pests namely fig moth (Ephestia cautella). Magnesium phosphide was tested for exposure times of 3 and 5 days at 0.70 g · m?³ phosphine (PH₃) and 1.33 g · m?³ PH₃ of dried fig in gas-tight storage units containing 15 ton of dried figs in boxes of 25-30 ㎏ to control two major pests of dried figs, fig moth and fig mite (Carpoglyphus lactis). The control fruits were fumigated with MeBr at 40 g · m?³ for 24 h. The results proved that the tested concentrations and exposure periods to PH₃ provided that 100% mortality of the test species. After exposure to PH₃ or MeBr, fruit quality was preserved under ambient storage conditions for 4 months. The lower dosage of PH₃ does not cause any adverse effect on fruit quality.
Quality and Nutritional Property Changes in Stored Dried Apricots Fumigated by Sulfur Dioxide
Fatih Sen,Mustafa Ozgen,Bayram Murat Asma,Uygun Aksoy 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.2
Apricots are grown in many countries and are marketed as dried or fresh. Sulfur fumigation is preferred as a low-cost pre-treatment to maintain apricot color. This study aims to determine the effect of sulfur dioxide (SO2) concentration on quality and nutritional properties of dried apricot fruits during storage. Apricot fruits were treated with different concentrations of SO2 (1,250, 2,000, and 3,500 mg・kg-1) and then stored at 20°C under 50-65% relative humidity conditions for 18 months. Fruit SO2 concentration decreased rapidly during the initial stage and then decreased at a slower rate. Fruit color darkening became more pronounced after 12 months, especially in the fruit treated with 1,250 and 2,000 mg・kg-1 SO2. After 18 months of storage, total phenolic content (839-890 mg GAE 100 g-1dry weight), antioxidant activity (9.4-11.6 μmol TE g-1 dry weight), and β-carotene levels (42.7-47.6 mg・kg-1) of all treatments varied only slightly, despite lower values overall. Therefore, SO2 levels must be chosen based on the expected storage conditions and length of the storage period.